The Team Fortress 2 Website describes
plans for changes to the environments in the multiplayer shooter, submitting a
list of questions to fans to get feedback. Here's how this is
introduced:

One of the things we're looking at for the next update is the
creation of a new type of environment for our levels to be built in. We're
pretty happy with the way our environments have turned out so far, but as we
create more and more maps with these achievement packs, we want our level
designers to have more to work with in terms of giving their settings a unique
look.

The challenging part of this type of design process is in finding types of
terrain and structures that provide an understandable, interesting set of
visuals and at the same time staying within the constraints of what we want to
do with gameplay. In addition to this, we want to be able to stay within the
strengths of the engine that TF is built around.

Hear hear! Let's get the Rock map back, and Border while we're at it. Anyone remember that simple 3-team one? Should take about 45 minutes for a Valve level designer to recreate, especially since they probably hired the guy that made the QWTF version.